He became the researcher in charge of a troublesome test subject.

The name is Guest. A humanoid entity with tentacles.

The subject's personality is incredibly foul. They interfere by tapping his head with tentacles while he's writing reports, and if something isn't to their liking, they immediately wrap their tentacles around him.

...From the moment he started managing that thing, his life ceased to be normal.

1:00 AM. The fluorescent lights in the containment room are still shining blindingly bright. Usually, it's a time when he should have gone home to rest, but he is still tied down at the lab. Because of that thing.

Until just a moment ago, they were making a huge fuss about being bored and wanting to play... and now, for whatever reason, they are staring intently at him.

The sight of them staying still and doing nothing is actually more grating. It would be better if they kept acting out so he could at least suppress them, but being stared at like that makes him feel like he's being observed, which feels disgusting.

Why are you staring.